PowerFlex regulation enables the 840 watts of total power to be configured to suit each specific application. The two 420 watt outputs can each supply up to 60 volts or up to 20 amps. See images for power curve.

Isolated tracking enables the outputs to be wired in series or parallel whilst controlled from a single voltage adjustment for up to 120 volts or 40 amps.

Analog controls with digital stability
As technology has changed, many products have moved from analog controls to digital ones. Although digital controls suit many instruments, they do not necessarily suit a bench power supply.

Customer research shows that many users prefer the speed and simplicity of conventional analog controls for setting voltage and current. Digital controls may offer greater precision, but often at the expense of ease-of-use. With this in mind, the CPX400 series retains the true analog controls of its predecessor.

The main disadvantage of analog controls is stability and security. The settings of analog potentiometers can drift over time. More importantly, the settings can be changed accidentally with potentially serious consequences. The CPX series now incorporates S-Lock. One press of the Lock button transfers control of voltage and current from the analog controls to internal digital circuitry. This offers not just complete security, but exceptional stability as well with each setting controlled by an instrumentation quality DAC.

Isolated voltage tracking for maximum flexibility
The two outputs of the CPX400D are completely independent and electrically isolated from each other.

With V-Track selected, the two outputs remain electrically isolated, but the voltage control of the Master output sets an identical voltage on the Slave output.

This enables the user to create two rails of either polarity and to reference them to different grounds if necessary (e.g. digital ground and analog ground). Alternatively the outputs can be wired in series or parallel to create a voltage capability up to 120V or a current capability up to 40A with the voltage set using a single control.

Independent and simultaneous output control
The Both On/Both Off button is in addition to the individual switches for each output, and allow both outputs to be turned on or off synchronously by a single button press.

Synchronous switching of the outputs is of increasing importance for circuitry which can be damaged if one voltage rail is present without the other.

Specifications

Voltage Range

0V to 60V

Current Range

0A to 20A

Ripple & Noise

Typically <3mV rms, <15mV pk-pk, (5mV rms max.) in CV mode

Load Regulation

Voltage - <0·01% of maximum output for any load change within the PowerFlex envelope (remote sense connected); Current - <0·05% of maximum output for any load change within the PowerFlex envelope

Line Regulation

Voltage - <0·01% of maximum output for a 10% line change; Current - <0·01% of maximum output for a 10% line change